Leading Comics was a comic book published by what is now DC Comics. At the title's inception, DC was actually two companies, National Comics (later National Periodical Publications) and All-American Publications. National and All-American shared some ownership and co-branded their comics as if they were one company. They also collaborated on All Star Comics, an All-American publication which featured the Justice Society of America, a super hero team including characters from both companies' stables, e.g., The Spectre and Starman from National, The Flash and Green Lantern from All-American.